Active power balancing method and system for massive alternating current power flow generation

Abstract

The invention discloses an active power balancing method and system for massive alternating current power flow generation, and belongs to the technical field of power transmission systems. The method comprises the following steps: for a power transmission system, carrying out statistics on a power generation load of the power transmission system, and based on the power generation load, calculating an active power unbalance amount in a power transmission system area; determining the capacity of a balancing machine in the power transmission system area, and determining an adjustment threshold value based on the capacity of the balancing machine; and based on the adjustment threshold value, the active power unbalance amount is allocated to a unit with an adjustment capability in the power transmission system area. Aiming at a power flow active balance part in a massive alternating current power flow generation process, active power balance analysis is carried out on power flow data, complete unit output is supplemented, and a starting mode and starting distribution are adjusted by calculating active power requirements of a key power transmission channel and each partition, so that the power flow meets boundary conditions, and active power balance is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power transmission systems, and more particularly, to an active balance method and system for massive AC power flow generation. BACKGROUND

[0002] With the rapid development of the global economy, energy demand is increasing day by day, and the traditional fossil fuel energy consumption pattern has led to problems such as energy resource shortage, environmental pollution, and climate change. In order to cope with these challenges, countries around the world are actively engaged in the development of green energy industries based on their resource conditions and economic development goals, especially intermittent energy sources such as wind and photovoltaic power generation.

[0003] China is in a high-speed development stage of intermittent energy generation, and the natural volatility of these natural resources has led to the intermittency and randomness of wind and photovoltaic power generation. The key to building a new power system is to coordinate the relationship between traditional power sources and new energy and promote high-proportion new energy consumption. For a long time, the imbalance between traditional resource endowments and economic development has led to the formation of a UHV power transmission structure and a "west-to-east" and "north-to-south" power transmission pattern in China. Due to the reverse distribution of new energy resources such as wind and solar energy and load centers, intensive development and large-scale utilization of more than one million kilowatt bases will become one of the important features of new energy generation. The power system needs real-time power balance, and the access of intermittent energy will inevitably bring great challenges to the safe operation of the power grid. With the increasing penetration rate of intermittent energy generation, its long-term, high-frequency, and large-scale random output fluctuations will bring greater risks to the safe operation of the power grid.

[0004] Traditional power grid flow analysis research is mostly based on deterministic models, but the output of intermittent energy sources changes randomly under the influence of uncertain factors such as weather, causing the continuous change of power system operation state. Therefore, the results obtained by using a deterministic model for power flow calculation cannot accurately reflect its impact on the operation of the power system. SUMMARY

[0005] In view of the above problems, the present application provides an active balance method for massive AC power flow generation, comprising:

[0006] For a power transmission system, the power generation load of the power transmission system is counted, and based on the power generation load, the active power imbalance in the power transmission system region is calculated;

[0007] The balance machine capacity in the power transmission system region is determined, and based on the balance machine capacity, the adjustment threshold value is determined;

[0008] Based on the adjustment threshold value, the active power imbalance is allocated to the units with adjustment capacity in the power transmission system region.

[0009] Optionally, the formula for calculating the active power imbalance within the transmission system area is as follows:

[0010] ΔP A =P AG -P ALD -P ALoss -P AO

[0011] Where, ΔP A P represents the active power imbalance within the region. AG For the active power contribution within the region, P ALD For the load in the area, P ALoss For the loss within the region, P AO This refers to power transmission, which is the exchange of power with external sources, with transmission being the positive direction.

[0012] Optionally, adjust the threshold value, including: increasing the threshold value ΔP. up and lowering the threshold value ΔP down The ΔP up and ΔP down All are greater than 0.

[0013] Optional, determine ΔP A Whether the threshold value has been reached, if ΔP A >ΔP up or ΔP A <-ΔP down Then the active power imbalance will be distributed to the generating units with regulation capabilities within the power transmission system area.

[0014] Optionally, the active power imbalance may be distributed to generating units with regulating capabilities within the transmission system area, including:

[0015] Calculate the maximum output capacity and minimum output limit of the adjustable unit, and calculate the current output of the adjustable unit based on the maximum output capacity and minimum output limit of the adjustable unit;

[0016] Based on the current output of the adjustable unit, the upward adjustment capacity P of the adjustable unit is calculated. CGup And the downward adjustment capacity P of the adjustable unit Cdown ;

[0017] If ΔP up <ΔP A <P CGup If -P Cdown <ΔP A <-ΔP min If the adjustable unit needs to reduce its output, then ΔP AP CGup or ΔP A <-P Cdown , the adjustable unit adjustment capacity is insufficient.

[0018] Optionally, the up-regulation capacity P CGup of the adjustable unit is calculated, and the calculation formula is as follows:

[0019] P CGup =P Cimax -P CG

[0020] Wherein, P Gimax is the maximum output capacity of the regional unit, and P CG is the current output of the adjustable unit.

[0021] Optionally, the down-regulation capacity P Cdown of the adjustable unit is calculated, and the calculation formula is as follows:

[0022] P Cdown =P CG -P Cimin

[0023] Wherein, P Cimin is the minimum output capacity of the regional unit, and P CG is the current output of the adjustable unit.

[0024] Optionally, the adjustable unit is adjusted in a sequential adjustment manner to allocate the active power imbalance to the units with regulation capacity in the power transmission system region, and the method comprises the following steps:

[0025] The adjustable units are arranged in a sequence, and the active power imbalance is allocated to the adjustable units in turn until the active power imbalance is less than a threshold value.

[0026] After each adjustment, the active power imbalance is updated and it is determined whether the active power imbalance is less than the threshold value.

[0027] In another aspect, the present application further provides an active balancing system for massive alternating current power flow generation, comprising:

[0028] A first calculation unit is configured to calculate the active power imbalance in the power transmission system region based on the power generation load of the power transmission system.

[0029] A threshold setting unit is configured to determine the balancing machine capacity in the power transmission system region, and determine the regulation threshold value based on the balancing machine capacity.

[0030] An adjusting unit is configured to allocate the active power imbalance to the units with adjusting capacity in the power transmission system region based on the adjusting threshold value.

[0031] Optionally, the calculation formula of the active power imbalance in the power transmission system region is as follows:

[0032] ΔP A = P AG - P ALD - P ALoss - P AO

[0033] wherein, ΔP A is the active power imbalance in the region, P AG is the active power output in the region, P ALD is the load in the region, P ALoss is the loss in the region, and P AO is the power sent out, i.e. the power exchange with the outside, and the positive direction is the power sent out.

[0034] Optionally, the adjusting threshold value comprises: an upward adjusting threshold value ΔP up and a downward adjusting threshold value ΔP down , and both the ΔP up and the ΔP down are greater than 0.

[0035] Optionally, it is judged whether the ΔP A reaches the threshold value, if the ΔP A > ΔP up or the ΔP A < -ΔP down , the active power imbalance is allocated to the units with adjusting capacity in the power transmission system region.

[0036] Optionally, the allocation of the active power imbalance to the units with adjusting capacity in the power transmission system region comprises:

[0037] calculating the maximum output capacity of the adjustable unit and the minimum output limit of the adjustable unit, and calculating the current output of the adjustable unit based on the maximum output capacity of the adjustable unit and the minimum output limit of the adjustable unit;

[0038] calculating the upward adjusting capacity P CGup of the adjustable unit and the downward adjusting capacity P Cdown of the adjustable unit based on the current output of the adjustable unit;

[0039] if the ΔP up < ΔP A < P CGup , the adjustable unit needs to increase the output, and if -PCdown <ΔP A <−ΔP min , then the adjustable unit needs to reduce output, if ΔP A >P CGup or ΔP A <−P Cdown , then the adjustable unit is insufficient to adjust.

[0040] Optionally, the up-regulation capacity P CGup of the adjustable unit is calculated, and the calculation formula is as follows:

[0041] P CGup =P Cimax −P CG

[0042] Wherein, P Gimax is the maximum output capacity of the regional unit, and P CG is the current output of the adjustable unit. Optionally, the down-regulation capacity P Cdown of the adjustable unit is calculated, and the calculation formula is as follows:

[0043] P Cdown =P CG −P Cimin

[0044] Wherein, P Cimin is the minimum output capacity of the regional unit, and P CG is the current output of the adjustable unit.

[0045] Optionally, the adjustable unit is adjusted in a sequential adjustment manner to allocate the active power imbalance to the units with regulation capacity in the power transmission system region, and the method comprises the following steps:

[0046] The adjustable units are arranged in a sequence, and the active power imbalance is allocated to the adjustable units in turn until the active power imbalance is less than a threshold value.

[0047] After each adjustment, the active power imbalance is updated and it is determined whether the active power imbalance is less than the threshold value.

[0048] In another aspect, the application further provides a computing device, comprising: one or more processors;

[0049] The processor is used for executing one or more programs.

[0050] When the one or more programs are executed by the one or more processors, the method described above is realized.

[0051] In still another aspect, the present application also provides a computer readable storage medium, in which a computer program is stored, and the computer program, when executed, implements the method as described above.

[0052] Compared with the prior art, the present application has the following beneficial effects:

[0053] The present application provides an active balance method for mass AC power flow generation, comprising: for a power transmission system, counting power generation load of the power transmission system, calculating active power imbalance in a power transmission system region based on the power generation load, determining balancing machine capacity in the power transmission system region, determining an adjustment threshold value based on the balancing machine capacity, and based on the adjustment threshold value, allocating the active power imbalance to units with adjustment capacity in the power transmission system region. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 is a flow chart of the method of the present application;

[0055] Figure 2 is a flow chart of the method of the present application;

[0056] Figure 3 is a structural diagram of the system of the present application. DETAILED DESCRIPTION

[0057] Reference will now be made to the drawings to describe the exemplary embodiments of the present application in detail. The present application can be implemented in various forms, and is not limited to the embodiments described herein, which are provided to fully and completely disclose the present application and to fully convey the scope of the present application to those skilled in the art. The terms used in the exemplary embodiments represented in the drawings are not limited to the present application. In the drawings, the same elements are designated with the same reference numerals.

[0058] Unless otherwise defined, the terms (including technical terms) used herein have meanings commonly understood by those skilled in the art. In addition, it is to be understood that the terms defined in commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art, and not to be interpreted in an idealized or overly formal sense.

[0059] Example 1:

[0060] The application provides an active balance method for mass alternating current power flow generation, as shown in the formula: Figure 1

[0061] Step 1, for a power transmission system, the power generation load of the power transmission system is counted, and the active power imbalance in the power transmission system region is calculated based on the power generation load;

[0062] Step 2, the balancing machine capacity in the power transmission system region is determined, and the adjustment threshold value is determined based on the balancing machine capacity;

[0063] Step 3, based on the adjustment threshold value, the active power imbalance is allocated to the units with adjustment capacity in the power transmission system region.

[0064] Wherein, the calculation formula of the active power imbalance in the power transmission system region is as follows:

[0065] ΔP A = P AG -P ALD -P ALoss -P AO

[0066] Wherein, ΔP A is the active power imbalance in the region, P AG is the active power output in the region, P ALD is the load in the region, P ALoss is the loss in the region, and P AO is the external power, that is, the power exchange with the outside, and the positive direction is the external power.

[0067] Wherein, the adjustment threshold value includes: the upward adjustment threshold value ΔP up and the downward adjustment threshold value ΔP down , and the ΔP up and ΔP down are greater than 0.

[0068] Wherein, it is judged whether ΔP A reaches the threshold value, if ΔP A > ΔP up or ΔP A < -ΔP down , the active power imbalance is allocated to the units with adjustment capacity in the power transmission system region.

[0069] Wherein, the active power imbalance is allocated to the units with adjustment capacity in the power transmission system region, including:

[0070] ​The maximum output capacity of the adjustable unit and the minimum output limit of the adjustable unit are calculated, and the current output of the adjustable unit is calculated based on the maximum output capacity of the adjustable unit and the minimum output limit of the adjustable unit;

[0071] The up-regulation capacity P CGup and the down-regulation capacity P Cdown of the adjustable unit are calculated based on the current output of the adjustable unit.

[0072] If ΔP up <ΔP A <P CGup , the adjustable unit needs to increase the output, if -P Cdown <ΔP A <-ΔP min , the adjustable unit needs to reduce the output, if ΔP A >P CGup or ΔP A <-P Cdown , the regulation capacity of the adjustable unit is insufficient.

[0073] The calculation formula of the up-regulation capacity P CGup of the adjustable unit is as follows:

[0074] P CGup =P Cimax -P CG

[0075] Wherein, P Gimax is the maximum output capacity of the regional unit, and P CG is the current output of the adjustable unit.

[0076] The calculation formula of the down-regulation capacity P Cdown of the adjustable unit is as follows:

[0077] P Cdown =P CG -P Cimin

[0078] Wherein, P Cimin is the minimum output capacity of the regional unit, and P CG is the current output of the adjustable unit.

[0079] The adjustable unit is adjusted in the order adjustment mode to allocate the active power imbalance to the units with regulation capacity in the power transmission system region, including:

[0080] The adjustable units are arranged in order, and the active power imbalance is allocated to the adjustable units in turn until the active power imbalance is less than the threshold value.

[0081] After each adjustment, the active power imbalance is updated and it is determined whether it is less than the threshold value.

[0082] The process of power flow adjustment is usually complex, and can go through a gradual process of preliminary adjustment, fine adjustment, etc.

[0083] The purpose of active pre-adjustment is to analyze the active balance of power flow data according to the given boundary conditions, supplement the complete unit output, adjust the start-up mode and start-up distribution, so that the power flow meets the boundary conditions and achieves active balance. During active pre-adjustment, not only the planning scheme boundary conditions such as load prediction and regional power exchange need to be met, but also the constraints such as active balance, start-up mode, start-up distribution, and active reserve need to be considered.

[0084] Therefore, in the present application:

[0085] 1) Active power imbalance calculation, including:

[0086] The active imbalance calculation is to calculate the power generation load of the system before calculating the power flow, and to calculate the active imbalance. Taking a certain region as an example, the calculation is as follows:

[0087] Maximum output capacity of the region:

[0088]

[0089] Minimum output limit of the region:

[0090]

[0091] Active output of the region:

[0092]

[0093] Load of the region:

[0094]

[0095] Loss of the region:

[0096] P ALoss = ε A P ALD

[0097] Then the active imbalance power of the region is:

[0098] ΔP A = P AG -P ALD -P ALoss -P AO

[0099] 2) Active power balance adjustment, including:

[0100] The idea of active power balance adjustment is to allocate the active power imbalance of the area to the units with adjustment ability. First, the adjustment threshold value ΔP up and ΔP down are both numbers greater than 0. When the imbalance power ΔP A is greater than the upward adjustment threshold value ΔP up or less than the downward adjustment threshold value -ΔP down , the imbalance power needs to be allocated.

[0101] If all adjustable units participate in the adjustment, all adjustable units jointly bear the imbalance power.

[0102] The specific steps are as follows:

[0103] Calculate the maximum output capacity of the adjustable unit:

[0104]

[0105] Calculate the minimum output limit of the adjustable unit:

[0106]

[0107] Calculate the current output of the adjustable unit:

[0108]

[0109] Calculate the upward adjustment capacity of the adjustable unit:

[0110] P CGup = P Cimax - P CG

[0111] Calculate the downward adjustment capacity of the adjustable unit:

[0112] P Cdown = P CG - P Cimin

[0113] If ΔP up < ΔP A < P Cup , the adjustable unit needs to increase the output, and the adjustment capacity is sufficient; if -P Cdown < ΔP A < -ΔP min , the adjustable unit needs to reduce the output, and the adjustment capacity is sufficient; if ΔP A > P Cup or ΔP A < -P Cdown , the adjustable unit adjustment capacity is insufficient.

[0114] The adjustable units can also be adjusted in sequence. In this case, the adjustable units are arranged in sequence, and the unbalanced power is distributed to the adjustable units in sequence until the unbalanced power is less than the threshold value. The unbalanced power is updated after each adjustment, and it is determined whether the unbalanced power is less than the threshold value.

[0115] The specific steps are as follows:

[0116] The adjustable units are arranged in sequence into a set: Ω = {C1, C2, C3,..., C n}.

[0117] It is determined whether ΔP A exceeds the threshold value. If ΔP up < ΔP A , the adjustable unit needs to increase the output, and if ΔP A > ΔP min , the adjustable unit needs to reduce the output. Otherwise, the process is exited.

[0118] The output of the adjustable unit is adjusted.

[0119] When the adjustable unit needs to increase the output:

[0120]

[0121] When the adjustable unit needs to reduce the output:

[0122]

[0123] It is determined whether there is an adjustable unit that has not been adjusted. If yes, the step 2 (determining whether ΔP A exceeds the threshold value) is performed, and if no, it is further determined whether the unbalanced power ΔP A is 0. If not, it is prompted that the adjustable unit adjustment capacity is insufficient, and if yes, the process is normally exited.

[0124] The specific embodiment of the present application will be further described in detail below with reference to a certain power grid.

[0125] The active power balancing method of the present application is mainly used to realize the reasonable distribution of the active power of the entire system, and mainly how to realize the control of the section power and the start-up adjustment of the unit. In principle, the load is not adjusted, and the basic process is as shown in Figure 2 , and includes:

[0126] The active power balancing process is relatively complex. After the data is read in, the network structure needs to be analyzed and adjusted, and the basic process is as follows:

[0127] The BPA power flow data and the production simulation calculation result PPS file are read in.

[0128] Read in the input section control data, including section composition lines and controlled power values; for data containing A cards and I cards, which contain complete sections, also need to be read in and processed.

[0129] Topological analysis is performed on the section to determine whether it is a complete section or an incomplete section. A complete section can divide the system into two independent parts, while an incomplete section

[0130] Read in the data related to generator adjustment. Generator adjustment can be adjusted in the order specified by the user or automatically by the program based on topology, voltage level, etc. The user can specify the order to improve the targeting of generator adjustment.

[0131] Based on the complete section, perform topological analysis on the network to obtain multiple independent subsystems divided by the section, and then process each independent subsystem as a unit. For an independent subsystem:

[0132] Calculate the active power balance in the subsystem, taking the tie-line power control value as a fixed power amount, and calculate the power deviation of the tie-line power, generation, and load, taking into account partial losses;

[0133] Calculate the adjustable generators. If the power deviation is positive, calculate the generators with output; otherwise, calculate the generators that can increase output (can be started);

[0134] Sort the generators based on the order specified by the user. If the user-specified generators meet the needs of deviation adjustment, stop searching; otherwise, continue adjusting the order considering other factors;

[0135] Continue to adjust the order based on voltage level, electrical distance, etc. In addition, topological analysis of low voltage level areas of the network is needed to adjust the order of generators considering the low voltage level power demand; other rules may also be considered, such as at least one generator in a thermal power plant;

[0136] After determining the generator adjustment order, adjust the generators in order (one by one) until the power deviation is within a certain range.

[0137] If there is an incomplete section, as the network cannot be completely divided, the sensitivity of different generators to the section line needs to be considered for adjustment. Incomplete section adjustment needs to be based on the division of the network by the complete section:

[0138] Calculate the sensitivity of the generators in the subsystem to the incomplete section;

[0139] The generator sequence is arranged, in the case of ensuring the manually designated generator sequence, the other generators are sorted according to the sensitivity, and some of the basic principles mentioned above are appropriately considered;

[0140] The deviation of the power of the incomplete section from the set value is counted, the generator is adjusted, and the deviation is gradually reduced until a certain limit.

[0141] Embodiment 2:

[0142] In another aspect, the application also provides an active balance system 200 for mass alternating current power flow generation, as shown in the figure, comprising: Figure 3

[0143] The first calculation unit 201 is used for counting the power generation load of the power transmission system, and calculating the active power imbalance in the power transmission system region based on the power generation load;

[0144] The setting threshold unit 202 is used for determining the balancing machine capacity in the power transmission system region, and determining the adjustment threshold value based on the balancing machine capacity;

[0145] The adjustment unit 203 is used for distributing the active power imbalance to the generators with adjustment capacity in the power transmission system region based on the adjustment threshold value.

[0146] The calculation formula of the active power imbalance in the power transmission system region is as follows:

[0147] ΔP A = P AG -P ALD -P ALoss -P AO

[0148] Wherein, ΔP A is the active power imbalance in the region, P AG is the active power output in the region, P ALD is the load in the region, P ALoss is the loss in the region, and P AO is the external power, that is, the power exchange with the outside, and the positive direction is the external power.

[0149] Wherein, the adjustment threshold value includes: the upward adjustment threshold value ΔP up and the downward adjustment threshold value ΔP down , and the ΔP up and ΔP down are greater than 0.

[0150] Wherein, it is judged whether ΔP A reaches the threshold value, if ΔP A > ΔP​up or ΔP A < - ΔP down then the active power imbalance is allocated to the adjustable units in the power transmission system area having adjustment capacity.

[0151] wherein allocating the active power imbalance to the adjustable units in the power transmission system area having adjustment capacity comprises:

[0152] calculating the maximum output capacity of the adjustable units and the minimum output limit of the adjustable units, and calculating the current output of the adjustable units based on the maximum output capacity of the adjustable units and the minimum output limit of the adjustable units;

[0153] calculating the upper adjustment capacity P CGup and the lower adjustment capacity P Cdown of the adjustable units based on the current output of the adjustable units;

[0154] if ΔP up < ΔP A < P CGup , the adjustable units need to increase output, if -P Cdown < ΔP A < - ΔP min , the adjustable units need to reduce output, if ΔP A > P CGup or ΔP A < - P Cdown , the adjustment capacity of the adjustable units is insufficient.

[0155] wherein the calculation formula of the upper adjustment capacity P CGup of the adjustable units is as follows:

[0156] P CGup = P Cimax - P CG

[0157] wherein P Gimax is the maximum output capacity of the regional units, and P CG is the current output of the adjustable units.

[0158] wherein the calculation formula of the lower adjustment capacity P Cdown of the adjustable units is as follows:

[0159] P Cdown = P CG - P Cimin

[0160] wherein P Cimin is the minimum output capacity of the regional units, and P CG is the current output of the adjustable units.

[0161] The adjustable units are adjusted in a sequential adjustment manner to allocate the active power imbalance to the units with adjustment capability in the power transmission system area, and the method comprises the following steps of:

[0162] The adjustable units are arranged in a sequential order, and the active power imbalance is sequentially allocated to the adjustable units until the active power imbalance is less than a threshold value.

[0163] After each adjustment, the active power imbalance is updated and it is determined whether the active power imbalance is less than the threshold value.

[0164] The present application is aimed at the active power balance part in the process of generating massive AC power flow, and the active power balance analysis is performed on the power flow data by calculating the key power transmission channel and the active power demand of each subarea, the unit output is supplemented, the start-up mode and start-up distribution are adjusted, the power flow satisfies the boundary condition, and the active power balance is achieved, which has great significance for improving the safe operation level of the power grid and social and economic benefits.

[0165] Embodiment 3

[0166] Based on the same inventive concept, the present application further provides a computer device, which comprises a processor and a memory, the memory is used for storing a computer program, the computer program comprises program instructions, and the processor is used for executing the program instructions stored in the computer storage medium. The processor can be a central processing unit (CPU), and can also be other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components and the like, which are the computing core and control core of the terminal, and are suitable for implementing one or more instructions, and are specifically suitable for loading and executing one or more instructions in the computer storage medium to implement a corresponding method process or a corresponding function, so as to implement the steps of the method in the above-mentioned embodiments.

[0167] Embodiment 4

[0168] Based on the same inventive concept, the present application also provides a storage medium, specifically a computer readable storage medium (Memory), which is a memory device in a computer device, used for storing programs and data. It can be understood that the computer readable storage medium herein can include an internal storage medium in the computer device, and of course can also include an extended storage medium supported by the computer device. The computer readable storage medium provides a storage space, which stores an operating system of the terminal. In addition, one or more instructions suitable for being loaded and executed by the processor are also stored in the storage space, and the instructions can be one or more computer programs (including program codes). It should be noted that the computer readable storage medium herein can be a high-speed RAM memory, or a non-volatile memory such as at least one disk memory. One or more instructions stored in the computer readable storage medium can be loaded and executed by the processor to realize the steps of the method in the above embodiments.

[0169] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROMs, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of the present application can be implemented in various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0170] The present application is described with reference to flowcharts and / or block diagrams of the method, device (system), and computer program product according to the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device produce a device that implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The functions specified in one or more flows and / or blocks Figure 1 The device that implements the functions specified in one or more flows and / or blocks.

[0171] These computer program instructions can also be stored in a computer- readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instructions which implement the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0172] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the Figure 1 function specified in the flow or flows and / or blocks Figure 1 of the block or blocks.

[0173] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to cover all such additional variations and modifications as fall within the scope of the present application. What is claimed is:

[0174] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims and their equivalents, the application can be practiced otherwise than as specifically described.

Claims

1. An active balancing method for mass alternating current flow generation, characterized in that, The method comprises: For a power transmission system, counting power generation load of the power transmission system, calculating active power imbalance in a power transmission system area based on the power generation load; Determining balancing machine capacity in the power transmission system area, determining adjustment threshold value based on the balancing machine capacity; Based on the adjustment threshold value, allocating the active power imbalance to machines with adjustment capacity in the power transmission system area.

2. The active balancing method of claim 1, wherein, The calculation formula for calculating the active power imbalance in the power transmission system area is as follows: ΔP A = P AG - P ALD - P ALoss - P AO where ΔP A is the active power imbalance in the area, P AG is the active power production in the area, P ALD is the load in the area, P ALoss is the losses in the area, P AO is the export power, i.e. the power exchange with the outside world, positive in the direction of export.

3. The active balancing method of claim 1, wherein, The adjusting threshold value includes: increasing the threshold value ΔP up and decreasing the threshold value ΔP down , wherein ΔP up and ΔP down are both greater than 0.

4. The active balancing method of claim 1, wherein, determining ΔP A whether a threshold is reached, if ΔP A > ΔP up or ΔP A < - ΔP down then the active power imbalance is distributed to the units with regulating capacity in the power transmission system area.

5. The active balancing method of claim 4, wherein, The allocation of the active power imbalance to the machines with adjustment capacity in the power transmission system area comprises: Calculating maximum output capacity of adjustable machines and minimum output limit of adjustable machines, calculating current output of the adjustable machines based on the maximum output capacity of the adjustable machines and the minimum output limit of the adjustable machines; Based on the current output of the adjustable unit, the up-regulation capacity P of the adjustable unit is calculated CGup and the down-regulation capacity P of the adjustable unit Cdown ; If ΔP up < ΔP A < P CGup The adjustable unit needs to increase output, if ΔP Cdown < ΔP A < -ΔP min The adjustable unit needs to decrease output, if ΔP A > P CGup Or ΔP A < -P Cdown The adjustable unit is not capable of adjusting.

6. The active balancing method of claim 5, wherein, said calculating an up-regulation capacity P of the adjustable unit CGup The calculation formula is as follows: P CGup = P Cimax - P CG P Gimax is the maximum power capability of the regional unit, P CG is the current power output of the adjustable unit.

7. The active balancing method of claim 5, wherein, said computing a down-regulation capability P of the adjustable unit Cdown the formula for the calculation is as follows: P Cdown = P CG - P Cimin Pmin= Pmin+ P Cimin Pmin= Pmin+ P CG Pmin= Pmin+ P 8. The active balancing method of claim 4, wherein, Adjusting the adjustable machines in a sequential adjustment manner to allocate the active power imbalance to the machines with adjustment capacity in the power transmission system area, comprising: Arranging the adjustable machines in a sequential order, and allocating the active power imbalance to the adjustable machines in turn until the active power imbalance is less than the threshold value; After each adjustment, updating the active power imbalance and determining whether it is less than the threshold value.

9. An active balancing system for mass alternating current flow generation, characterized by, The method comprises: A first calculation unit for, for a power transmission system, counting power generation load of the power transmission system, calculating active power imbalance in a power transmission system area based on the power generation load; A threshold setting unit for determining balancing machine capacity in the power transmission system area, determining adjustment threshold value based on the balancing machine capacity; An adjustment unit for, based on the adjustment threshold value, allocating the active power imbalance to machines with adjustment capacity in the power transmission system area.

10. The active balancing system of claim 9, wherein, The calculation formula for calculating the active power imbalance in the power transmission system area is as follows: ΔP A = P AG - P ALD - P ALoss - P AO where ΔP A is the active power imbalance in the area, P AG is the active power production in the area, P ALD is the load in the area, P ALoss is the losses in the area, P AO is the export power, i.e. the power exchange with the outside world, positive in the direction of export.

11. The active balancing system of claim 9, wherein, The adjusting threshold value includes: increasing the threshold value ΔP up and decreasing the threshold value ΔP down , wherein ΔP up and ΔP down are both greater than 0.

12. The active balancing system of claim 9, wherein, determining ΔP A whether a threshold is reached, if ΔP A > ΔP up or ΔP A < - ΔP down then the active power imbalance is distributed to the units in the transmission system area that have regulating capacity.

13. The active balancing system of claim 12, wherein, The allocation of the active power imbalance to the machines with adjustment capacity in the power transmission system area comprises: Calculating maximum output capacity of adjustable machines and minimum output limit of adjustable machines, calculating current output of the adjustable machines based on the maximum output capacity of the adjustable machines and the minimum output limit of the adjustable machines; Based on the current output of the adjustable unit, the up-regulation capacity P of the adjustable unit is calculated CGup and the down-regulation capacity P of the adjustable unit Cdown ; If ΔP up < ΔP A < P CGup then the adjustable unit needs to increase its output, if -P Cdown < ΔP A < -ΔP min then the adjustable unit needs to decrease its output, if ΔP A > P CGup or ΔP A < -P Cdown then the adjustable unit has insufficient regulation capacity.

14. The active balancing system of claim 13, wherein, said calculating an up-regulation capacity P of the adjustable unit CGup The calculation formula is as follows: P CGup = P Cimax - P CG P Gimax is the maximum power capability of the regional unit, and P CG is the current power output of the adjustable unit.

15. The active balancing system of claim 13, wherein, said computing a down-regulation capability P of the adjustable unit Cdown the formula for the calculation is as follows: P Cdown = P CG - P Cimin Pmin= Pmin+ P Cimin Pmin= Pmin+ P CG Pmin= Pmin+ P 16. The active balancing system of claim 12, wherein, Adjusting the adjustable machines in a sequential adjustment manner to allocate the active power imbalance to the machines with adjustment capacity in the power transmission system area, comprising: Arranging the adjustable machines in a sequential order, and allocating the active power imbalance to the adjustable machines in turn until the active power imbalance is less than the threshold value; After each adjustment, updating the active power imbalance and determining whether it is less than the threshold value.

17. A computer device, comprising: The method comprises: One or more processors; The processor is configured to execute one or more programs; When the one or more programs are executed by the one or more processors, the method as claimed in any one of claims 1-8 is implemented.

18. A computer-readable storage medium, characterized in that, The computer program is stored on the computer readable medium, and when the computer program is executed, the method as claimed in any one of claims 1-8 is implemented.

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